High-Sugar Fruit Can Result in False Positive on Breath Test|吃了荔枝做酒測 員警驗出酒精反應 | 公視新聞網 PNN

High-Sugar Fruit Can Result in False Positive on Breath Test|吃了荔枝做酒測 員警驗出酒精反應

Did you know, that you may have a high blood alcohol level if you eat a few lychees? Luckily, rinsing your mouth out with water will make the alcohol test go back to zero and prevent a fine. Nutritionists say, high-sugar fruits eaten on an empty stomach will produce a short-term alcohol reaction, and not only lychees, but pineapples and grapes may also produce the same effect.

People that have not been drinking don't need to worry about taking a breath alcohol test.

Thank you for your cooperation. The reading shows zero alcohol content.

Next, the police officer eats a lychee and breathes into the breathalyzer again. Surprisingly, the device now flashes red.

Sorry, you've been drinking.

After eating a couple of lychees, the breathalyzer shows a blood alcohol concentration of 0.02 micrograms. Traffic police in Cishan tested it out for themselves.

It's lychee season now. There have been videos asking if lychees cause problems with breathalyzers. This is why we conducted this test.

Police say there is a clear difference in behavior after consuming alcohol or fruit and people are allowed to rinse out their mouths before taking the test. This will send blood alcohol concentration levels back to zero if fruit was the cause. Experts say high-sugar fruits like lychees, pineapples and grapes produce a short-term alcohol reaction when eaten on an empty stomach.

High-sugar fruits produce alcohol and carbon dioxide through anaerobic respiration. Everyone has a different tolerance level for carbon dioxide and alcohol, and this affects the amount of alcohol in the oral cavity.

The alcohol reaction is caused by the rapid metabolism of fruit and drinking water will negate the reaction on breath tests. In contrast, alcohol takes much longer to metabolize and drinking water won't help.